Slot Closure Device for an Electrical Machine, Method for Closing a Slot of an Electrical Machine, Electrical Machine, and Motor Vehicle

A slot closure device for an electrical machine, the slot closure device comprising:

• a slot closure body comprising two lateral wing parts;
• a straight slit that extends in a longitudinal direction of the slot closure body, wherein, at a slit bottom of the slit, the wing parts are connected to one another,
• wherein the slit comprises:
• a first bracing bar seat that is arranged on the slit bottom;
• and
• a second bracing bar seat that is smaller than the first bracing bar seat and is arranged over the first bracing bar seat perpendicularly to the longitudinal direction;
• and
• a bracing bar that is arranged in the slit along the longitudinal direction,
• wherein the slot closure device is movable by moving the bracing bar within the slit out of one of the bracing bar seats into the other bracing bar seat, between:
• a mounting position in which the wing parts are relaxed owing to the bracing bar sitting form-fittingly in the first bracing bar seat,
• and a bracing position in which the wing parts are laterally braced apart by the bracing bar sitting form-fittingly in the second bracing bar seat,
• wherein a bracing width of the wing parts is smaller in the mounting position than in the bracing position.

A method comprising:

• closing, by a slot closure device, a slot that is formed by two teeth of a rotor or stator of an electrical machine, said teeth being adjacent in a circumferential direction,
• wherein the slot closure device comprises:
• a slot closure body comprising two lateral wing parts;
• a straight slit that extends in a longitudinal direction of the slot closure body,
• wherein, at a slit bottom of the slit, the wing parts are connected to one another,
• wherein the slit comprises:
• a first bracing bar seat that is arranged on the slit bottom;
• and
• a second bracing bar seat that is smaller than the first bracing bar seat and is arranged over the first bracing bar seat perpendicularly to the longitudinal direction;
• and
• a bracing bar that is arranged in the slit along the longitudinal direction,
• wherein the slot closure device is movable by moving the bracing bar within the slit out of one of the bracing bar seats into the other bracing bar seat, between:
• a mounting position in which the wing parts are relaxed owing to the bracing bar sitting form-fittingly in the first bracing bar seat,
• and a bracing position in which the wing parts are laterally braced apart by the bracing bar sitting form-fittingly in the second bracing bar seat,
• wherein a bracing width of the wing parts is smaller in the mounting position than in the bracing position;
• wherein the method comprises:
• inserting the slot closure device into the slot in the mounting position;
• and
• moving the slot closure device out of the mounting position into the bracing position by moving the bracing bar within the slit radially outward in a radial direction out of the first bracing bar seat into the second bracing bar seat.